Concrete surfacing machine



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H. H- RIDDELS ET AL CONCRETE SURFACING MACHINE April 2, 1957 Filed May 11, 1956 H. H. RIDDELS EIAL CONCRETE SURFACING MACHINE April .1957

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CONCRETE SURFACING MACHINE Filed May 11, 1956 4 Sheets-Sheet 4 INVENTOR. 2 71 HARRY H Ell-mas y Mwzo- H. RmoELs United States Patent CONCRETE SURFACING MACHINE Harry H. Riddels and Myron H. Riddels, Spring Valley, Calif.

Application May 11, 1956, Serial No. 584,283

20 Claims. (Cl. 51-180) This invention relates to improvements in concrete surfacing machines that are adapted for vertical and overhead surfacing and finishing.

An object of this invention is to provide a concrete surfacing machine that will grind and finish vertical walls and ceilings.

Another object of the invention is to provide a concrete surfacing machine that will provide a better surfac ing finish in less time and at less cost than machines of ths type that are available at the present time. t

A further object of the invention is to provide a concrete surfacing machine that can be controlled from one control panel and will employ in its use chemicals or plain cement.

The concrete machine embodying the invention. can

be utilized to cover one entire surface before it has to be moved to another location.

The grinders in the concrete surfacing machine are spring biased so that extremely rough surfaces will not stop the operation of the machine. The chemicals and cement may be used by the machine simultaneously to produce ,a smooth finish.

The grinders on the machine may rise and fall vertically or reciprocate horizontally as desired by the operator of the machine.

With the above and other objects and advantages in view the invention consists of the novel details of construction, arrangement and combination of parts more fully hereinafter described, claimed and illustrated in the accompanying drawings in which:

Fig. 1 is a side elevational View of a concrete surfacing machine embodying the invention in position to finish a vertical wall;

Fig. 2 is a bottom plan view of the chassis of the concrete surfacing machine;

Fig. 3 is a top plan view of the machine of Fig. 1;

Fig. 4 is a fragmentary perspective view of the elevator mechanism of the machine;

Fig. 5 is a detailed fragmentary view of the mount ing frame for the grinders;

Fig. 6 is a fragmentary detailed view partly broken away and partly in section, looking at the face of the grinders;

Fig. 7 is a vertical sectional view on the line 7-7 of Fig. 6; and

Fig. 8 is a fragmentary detailed sectional view 'of the hydraulic operating mechanism of the machine, in position to finish a ceiling.

Referring more in detail to the drawings, wherein like parts are designated by like reference numerals, the reference numeral 10 is used to generally designate a concrete surfacing machine embodying the invention.

The concrete surfacing machine 10 comprises a chassis 11 having a rear axle housing 12 mounted on springs 13 connected to the chassis. Rear ground-engaging wheels 14 being mounted on axles mounted in the housing 12 in the conventional manner. 1

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Front ground engaging wheels 15 are connected to the chassis 11 and steering mechanism 16 is connected to the wheels 15 in the conventional manner. A large hydraulic motor 17 is connected by a drive shaft coupling 18 and a gear case 19 to the differential 20 in the housing 12, whereby power is transmitted to the rear wheels 14.

The steering mechanism 16 is connected at 24 to a double acting hydraulic cylinder 21 and the cylinder 21 is provided with supply and return lines 22 and 23, respectively.

The concrete surfacing machine also comprises a platform 25 on which is mounted a circular plate 26.

Mounted on the plate 26, in radially disposed relation to each other, are a plurality of bearings 27 in which are journalled rollers 28. The rollers 28 have rolling contact with a large stationary gear 29 mounted on a circular plate 30 that is mounted on the chassis 11. A swivel shaft 31 connects the plate 26 to the chassis 11 in rotational relation therewith and a pinion gear 32, mounted on a drive shaft 33 of a hydraulic motor 34, engages the gear 29. The motor '34 is mounted on the undersurface of the platform 25 and rotates the pinion gear 32, which in turn rotates the platform 25 by engagement with the stationary gear 29.

A counter balance weight 35 to counterbalance the platform 25 is connected to the bottom surface thereof adjacent one edge thereof.

Viewing Fig. 3, there is shown an operators seat 36,

which is positioned in close proximity to an arcuate shaped control panel 37.

Mounted at one end of the platform 25 is a gas or diesel driven motor 38 which is controlled as to its operation from the control panel 37. A drive shaft 39 connects the motor 38.to a hydraulic pump 40, which is also mounted on the platform 25. The pump 40 being supplied from an oil supply tank 41 by means of an oil supply line 42 and another supply line 43 connects the pump 40 to the various controls on the control panel 37 and a return line 44 relieves the controls on the panel 37 so that the oil returns to the tank 41.

Mounted on the platform 25 in front of the control panel 37 is a dual rotation, dual shaft, hydraulic motor 45. The shafts 46 and 47 extend in opposite directions from the motor and a friction clutch 48 is connected to the shaft 46, while a friction clutch 49 is connected to the shaft 47. A winch 50 is controlled by the clutch 48 and a winch 51 is controlled bythe clutch 49. A pair of cables 52 and 53, respectively, are wound on the winch 50 and are connected at their free ends to fasteners 54 that are mounted on a movable elevator 55. The cables 52 and 53 are trained over sheaves or guide pulleys 56 that are connected to the platform 25.

Cables 57 and 58, respectively, are wound on the winch 51 as well as cables 59 and 60. Cables 57 and 59 extend in opposite directions from the winch 51 and are connected at their free ends tofasteners 61 on the opposite ends of an L-shaped supporting member or platform 62. The cables pass over guide pulleys 63 and guide pulleys 64 which are journalled in pulley supports 65 mounted on the bottom of the platform 25 in depending vertical relation thereto.

Cables 58 and 60 extend in opposite directions from the. winch 51 and are connected at their free ends to fasteners 66 connected to the platform 62. The cables pass over guide pulleys 67 that are journalled in pulley supports 68, which are mounted in vertical relation to the platform 25 at opposite ends thereof.

Viewing Fig. 2, it will be noted that the platform form 62 and a plurality of rollers 69 are mounted on the inner surface of the platform and have rolling engagement with the platform 62. Thus the platform 55is given sliding movement in relation to the platform 62 by reason of the cahles.5.2 and53.

The platform 62 provided with swivel pins 70 at the opposite endsthereof, whichare journalled in bearings 71 mounted at oppositeends of the platform 25. Thus, by reason ofthe Cables 58 and 60 the platform 62 may be raised on the swivel pins and by reason of the cables 57 and 59 the platform 62 may be lowered on the pins 70.

Mounted on each endof the platform 62 is a double acting hydraulic cylinder'72 and each cylinder is provided with supply and return lines 73 and 74, respectively. The plunger 75 of each cylinder 72 has an extension 76 thereon which. is provided with a foot 77 at its outer end that is adapted to engage the surface S that is being fin ishedto properly align the machine 10 with the surface S.

A hanger 78 is provided at each outer end of the platform 55 along the longitudinal front edge thereof. A pin 79 carried 'by each of the hangers 78 pivotally connects each of the hangers 78 to a channel guide 30. Mounted for sliding movement in the guides 30 are the channel shaped sides 81 and 82, respectively, of the elevator supporting frame '83. Ends 84 connect the ends of the sides 81 and '82 in parallel spaced relation to each other.

A double acting hydraulic cylinder 85 is connected at 86 to the upper surface of the platform 55 and at 87 to the side 82. A similar cylinder 85 is connected at 83 to the upper surface of the platform 55 and at 89 to the side 81. The cylinders being connected at the forward corners of the platform 55. A similar cylinder 85 is connected at 90 to the lower end of the side 82 and at 91 to the lower surface of the platform 55. A similar cylinder 85 is connected to the lower end of the side 81 and to the undersurface of the platform 55. Each of the cylinders 85 is provided with supply and return lines 92 and 93,-respectively.

The upper cylinders 85 operate in opposite directions to the lower cylinders 85 to properly align and support the frame 84. The supply and return lines 92 and 93 are flexible and are wound on a self-winding spring reel 94, mounted on the platform 25 and supply and return lines 95 and 96 connect the lines 92 and 93 to control valves on the control panel 37.

A double acting hydraulic cylinder 97 is connected at one end to each of the pins 79 and at their opposite ends to a bracket 98 on each of the sides 81 and 82, respectively.

Mounted for vertical reciprocation within the frame 83 is an elevatorframe 99 and rollers 100 are mounted on the frame 99, Fig. '5, for easy movement of the frame 99.

Guide arms 101 are mounted at each corner of the frame 99and each arm is provided with an elongated slot 102. A .boxlike frame 103 is mounted in the guide arms 101 and each of the ends .of the frame 103 are provided with a pair of pins 10.4 that engage in the slots 102. The frame 103 has transversely extending bars 105, 106 and 107, respectively. Motor mounts 108 are connected to the bars 105, 106 and 107, and a motor 109 is mounted in each of the mounts 108. Springs 110 are mounted on the mounts 108 in circumjacent relation thereto and the springs 11.0 tension the motors 109 so that circular grinders 111 mounted on drive shafts 112 of the motors 109 are tensioned in relation to the surface S which is being finished. Each of the grinders '111 is individually tensioned so that each grinder 111 can operate individually of each other to accommodate the grinders 111 to the uneven surface to be finished. Spring tensioned reels 113 and 114, respectively, connect the supply and return lines 115 and 116 for operating the motors 109 to the control panel 37.

A hydraulic cylinder 117 is connected at 124 to the bar 106 of the frame 1.03 and to a brace 118 for the frame 99. The cylinder 117 moves the frame 103 in the arms 101 to adjust the frame 103 in relation to the surface 5. Spring tensioned reels 119 and 120, respectively, connect the supply and return lines 121 and 122 for the cylinder 117 to the control panel 37 A dual rotation hydraulic motor 123 is mounted on the platform 55 and a winch 125 is connected to the motor 123. A cable 126 wound on the winch 125 is connected at one end at 127 to the top of the frame 99 and the cable 126 passes over apulley 123 mounted in the upper end 84 of the frame 83. The oppositeend of the cable 126 is connected at to the bottom of the frame 99 and the cable passes over a pulley 130 in the platform 55 and a pulley 131 at the lower end 84-of the frame 83. A spring tensioned reel 132 connects supply and return lines 133 and 134, respectively, of the motor 123 to the control panel 37.

A dual shaft hydraulic motor 135 is mounted on the platform 25 and a drive shaft 136 for the motor 135 is connected to a water pump 137 which forces water from a tank 138 by supply line 139, which is wound on reels 140 and 141, to the grinders 111.

A mortar supply tank 142 supplies mortar to the grinders 111 by means of supply line 143 which is wound on spring tensioned reels 144 and 145, respectively. A pump 146 driven by a drive shaft 147 for the motor 135 and the pump 146 is connected to the supply line. 143. Each of the drive shafts 136 and 147 have a friction clutch 148 interposedtherein.

The pump 137 is connected to the water tank 138 by a line 149 and the pump 146 is connected to the mortar tank 142 by a line 150.

In operation power is supplied by the motor 38 to the motor 17 by supply and return lines 151 and 152 so that the machine can travel over the ground. The pump 40 supplies fluid to the control panel 37 so that fluid may pass to the supply and return lines of all the hydraulic motors and control valves 153 in the control panel 37 interpolated in the supply and return lines control the operation of all the motors.

The motor 48 controls the movent of the platforms 55 and 62 to move the platform 55 back and forth on the platform 62 or move the platform 62 from the position of Fig. 4 to the position of Fig. 8 to surface a wall or a ceiling as desired. The control valves 153 also control the operation of the motors 109for rotating the grinders 111. The control valves 153 also control the motor 135 by means of supply and return lines 154 and 155 to spray water or mortar on the surface S to be finished.

The grinders 111 may move up and down by reason of the frame 99 and back and forth by reason of the platform 55, thus, an entire surface may be finished without movement of the machine 10.

The surface to be covered without moving depending upon the size of the machine 10, since the grinders 111 never extend beyond the limits of the platform 62.

There has thus been provided a concrete surfacing machine that will efficiently surface a wall or ceiling and it is believed that the operation and construction of the machine will be apparent to those skilled in the art.

It is also to be understood that changes in the minor details .of construction, arrangement and combination of parts may be resorted to provided they fall within the spirit of the invention and the scope of the appended claims.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

1. A concrete surface finishing machine comprising a chassis having ground engaging wheels thereon, a first platform mounted on said chassis in rotational relation thereto, a second platform pivotally connected to one longitudinal edge of said first platform in pivotal relation thereto, a third platform mounted on said second platform in reciprocal relation thereto, an-elevator frame mounted on said third platform, an elevator mounted in said frame and a plurality of power operated surface grinders mounted on said elevator.

2. A concrete surface finishing machine as in claim 1, wherein means is provided for rotating said first platform in relation to said chassis.

3. A concrete surface finishing machine as in claim 1, wherein means is provided for pivoting said second platform in relation to said first platform.

4. A concrete surface finishing machine as in claim 1, wherein means is provided for raising and lowering said elevator.

5. A concrete surface finishing machine as in claim 1, wherein means is provided for individually tensioning said grinders to compensate for uneven. surfaces to be finished.

6. A concrete surface finishing machine as in claim 1, wherein means is provided. for driving certain of said ground engaging wheels.

7. Aconcrete surface finishing machine as in claim 1, wherein said third platform is provided with rollers for engagement with said second platform to prevent binding of said third platform during the reciprocation of said third platform.

8. A concrete surface finishing machine as in claim 1, wherein said elevator is provided with rollers for engagement with said frame to prevent binding of said elevator during the rise and fall thereof within said frame.

9. A concrete surface finishing machine as in claim 1, wherein said elevator is provided with a supporting arm at each corner thereof and a motor mount for said grinders is adjustably connected to said supporting arms.

10. A concrete surface finishing machine as in claim 9, wherein means is provided for moving said motor mount in relation to said elevator.

11. A concrete surface finishing machine comprising a chassis having ground engaging wheels thereon, a first platform mounted on said chassis, a swivel pin connecting said first platform in rotational relation to said chassis, a gear mounted on said chassis below said first platform, a motor mounted on said first platform having a drive shaft on which is mounted a pinion gear, said pinion gear meshing with said gear for the rotation of said first platform, a second platform having bearings at the opposite ends thereof, swivel pins on said first platform mounted in said bearings for pivotally connecting said second platform to said first platform, a third platform mounted on said second platform in reciprocal relation thereto, means carried by said third platform for finishing a surface, power means mounted on said first platform and a plurality of hydraulic motors operated by said power means to rotate said first platform, pivot said second platform and reciprocate said third platform.

12. A concrete surface finishing machine as in claim 11, wherein an elevator frame is mounted on said third platform, an elevator is mounted in said frame and a plurality of motor operated grinders are mounted on said elevator 13. A concrete surface finishing machine as in claim 12. wherein a hydraulic motor is mounted on said first plat form, a winch is connected to said motor and a cable wound on said winch is connected at its opposite ends to said elevator for the raising and lowering thereof.

14. A concrete surface finishing machine as in claim 11, wherein a water tank and a mortar tank is mounted on said first platform and flexible supply lines are connected to said tanks for discharging water and mortar on a surface to be finished.

15. A concrete surface finishing machine as in claim 11, wherein flexible return and supply lines are provided for said motors and spring tensioned reels are provided for said return and supply lines.

16. A concrete surface finishing machine as in claim 11, wherein a control panel for operating said machine is mounted on said first platform.

17. A concrete surface finishing machine as in claim 16, wherein a plurality of control valves are mounted on said control panel and return and supply lines are connected to said motors and said control valves whereby said motors may be controlled by said control valves.

18. A concrete surface finishing machine as in claim 11, wherein the motors for pivoting said second platform and reciprocating said third platform have winches connected thereto and cables wound thereon are connected to said second and third platforms for the movement thereof.

19. A concrete surface finishing machine as in claim 18, wherein guide pulleys are provided for said cables.

20. A concrete surface finishing machine as in claim 19, wherein pulley supports are provided for certain of said pulleys and said supports are mounted on said second platform.

References Cited in the file of this patent UNITED STATES PATENTS 1,176,262 Zoboli et al Mar. 21, 1916 1,308,933 Cavicchi July 8, 1919 2,075,369 Stetler Mar. 30, 1937 2,124,705 Locklin July 26, 1938 

